diff --git a/src/select-panel/default-item.tsx b/src/select-panel/default-item.tsx
index 2dfea94..466905e 100644
--- a/src/select-panel/default-item.tsx
+++ b/src/select-panel/default-item.tsx
@@ -15,7 +15,7 @@ const DefaultItemRenderer = ({
   onClick,
   disabled,
 }: IDefaultItemRendererProps) => (
-  <div className={`item-renderer ${disabled && "disabled"}`}>
+  <div className={`item-renderer ${disabled ? "disabled" : ""}`}>
     <input
       type="checkbox"
       onChange={onClick}
diff --git a/src/select-panel/select-item.tsx b/src/select-panel/select-item.tsx
index 0938cd0..e5e0782 100644
--- a/src/select-panel/select-item.tsx
+++ b/src/select-panel/select-item.tsx
@@ -49,7 +49,7 @@ const SelectItem = ({
 
   return (
     <label
-      className={`select-item ${checked && "selected"}`}
+      className={`select-item ${checked ? "selected" : ""}`}
       role="option"
       aria-selected={checked}
       tabIndex={tabIndex}